3D打印混凝土打印性能评价参数的提出及试验验证  

Proposal and test verification of 3D printing concrete printing performance evaluation parameters

作　　者：董赛阳 瞿威 潘瑞 左自波 赖建中[3] 朱敏涛 苟鸿翔 孙振平[4] DONG Saiyang;QU Wei;PAN Rui;ZUO Zibo;LAI Jianzhong;ZHU Mintao;GOU Hongxiang;SUN Zhenping(Shanghai Construction Building Materials Technology Group Co.,Ltd.,Shanghai 200086,China;Shanghai Construction Group Co.,Ltd.,Shanghai 200080,China;School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Materials Science and Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]上海建工建材科技集团股份有限公司,上海200086 [2]上海建工集团股份有限公司,上海200080 [3]南京理工大学材料科学与工程学院,江苏南京210094 [4]同济大学材料科学与工程学院,上海201804

出　　处：《混凝土》2024年第9期67-73,84,共8页Concrete

基　　金：国家重点研发计划资助(2018YFC0705806);上海建工建材科技集团股份有限公司重点研发计划资助(JCKJKY22-YJY-1)。

摘　　要：3D打印混凝土需要同时满足泵送性、挤出性和建造性的要求,其中,对混凝土拌合物的泵送性和建造性的综合评价尤为重要。提出了以流坍比和稠坍比表征的材料触变参数,并以3种外加剂(羟丙基甲基纤维素醚(HPMC-6)、可再分散乳胶粉(RLP)、硅酸镁铝(TL))为研究对象,基于正交试验研究了3种外加剂对3D打印混凝土触变参数的影响规律。研究表明:可以采用提出的触变参数定量地对3D打印混凝土泵送性和建造性进行综合评价,3种外加剂对触变参数的影响程度为HPMC-6>RLP/TL,3种外加剂的掺入都会使材料触变参数的下降。3D printing concrete needs to meet the requirements of pumpability,extrudability and constructability at the same time,among which the comprehensive evaluation of the pumpability and constructability of concrete mixture is particularly important.It is important to evaluate the printing performance of materials by coupling them.Thixotropic parameters characterized by flow slump ratio and consistency slump ratio are proposed to evaluate the printing performance of materials under the coupling of pumping and construction.Taking hydroxypropyl methyl cellulose ether(HPMC-6),redispersible latex powder(RLP)and magnesium aluminum silicate(TL)as the research objects,based on the orthogonal test,the influence of the three additives on the thixotropic parameters of 3D printing concrete was studied.The research shows that the thixotropy parameters proposed can be used to quantitatively evaluate the pumping ability and constructability of 3D printing concrete.The influence of three additives on thixotropy parameters is HPMC-6>RLP/TL,and the addition of three additives will lead to the decrease of thixotropy parameters of materials.

关 键 词：3D打印混凝土 打印性能 泵送性 建造性 外加剂 评价 

分 类 号：TU528.01[建筑科学—建筑技术科学]